<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
	</head>
	<body>
		<button id="btn">我是一个按钮</button>
		<script type="text/javascript">
//			console.log(document);
			var btn = document.getElementById("btn");
//			console.log(btn);
//			console.log(btn.innerHTML);
			btn.innerHTML = "I 'm Button";
		</script>
	</body>
</html>
